Re: How can I optimize my adword campaign?

I would say start with the Search campaigns. Thus you have to focus on good keyword strategy. In order to find best keywords use Keyword planner tool.

As your audiences are technically know about Clipping Path, so create a good landing page that conveys and reflects proper messaging.I would also add Remarketing code in website, once it will be enough, start running Remarketing campaigns.

In addition to that i would suggest to read the below article for AdWords Success.